Although this book is written with the D20 system in mind, it applies to second edition as well. We enjoy all the "dummies" books and this one is no exception. It gives you plenty of tools to keep in your DM arsenal.Our games are now much more organized, flow better, and has made DMing a much more enjoyable part of the hobby as opposed to a chore you get stuck with.A great tool for experienced AND new DMs alike. This book would have gained an extra star if a little less time was spent on the social skills to finding games and players. I feel this is space that could have been used more on fantasy cartography, and more inspirations.Even still, this was a book that improved our gaming greatly.